Alert archive / Michigan / Severe Thunderstorm Warnings in 1986
Severe Thunderstorm Warning 18, NWS Grand Rapids, MI
NWS Grand Rapids, MI issued this severe thunderstorm warning at Jul 15, 1986, 10:00 PM EDT for Clinton County, Ingham County, Michigan. It was in force for 60 min. 1 report came from inside the area while it was in force.
The area
The counties it named, with what was reported inside it.
The facts
- Issued
- Jul 15, 1986, 10:00 PM EDT (02:00 UTC)
- Expired
- Jul 15, 1986, 11:00 PM EDT
- In force
- 60 min
- Issued by
- NWS Grand Rapids, MI
- Area
- Whole counties
Counties Clinton County, MI, Ingham County, MI
The radar
The WSR-88D network and its archive begin in 1991, so there is no radar volume for this alert.
What was reported inside it
| Time | Report | Where | Remark |
|---|---|---|---|
| Jul 15, 10:00 PM EDT | Thunderstorm Wind 0 | Ingham, MI |
NCEI Storm Data entries that began inside the alert's area while it was in force. Before 2003 the local storm report archive is thin, so this is the record of what happened rather than what was phoned in. Storm Data before 1996 records only tornadoes, thunderstorm wind and hail.
The nearest sounding before it
Detroit, MI (KFNT), launched 00:00Z, 2.0 hours before the alert went out and 86 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.
- Mixed-layer CAPE
- 0 J/kg
- Mixed-layer CIN
- No buoyant parcel
- Mixed-layer LCL
- NaN m above ground
- 0-6 km bulk shear
- 34 kt
- 0-1 km storm-relative helicity
- 20 m²/s²
- 0-3 km storm-relative helicity
- 123 m²/s²
- Significant tornado parameter
- 0.0
- Supercell composite
- 0.0
The text
The text of this product is not in the archive. The NWS text archive before 2002 is incomplete.
What forecasters said that day
The local office's own words before this severe thunderstorm warning went out, as it sent them, from the Iowa Environmental Mesonet's archive of National Weather Service text.
In the hours before
Special weather statement, Jul 15, 6:54 PM EDT, 3 hours 6 minutes before
SPECIAL WEATHER STATEMENT NATIONAL WEATHER SERVICE MUSKEGON MI 654 PM EDT TUE JUL 15 1986 ...VERY STRONG THUNDERSTORMS CROSSING CENTRAL LAKE MICHIGAN... A SPECIAL MARINE WARNING CONTINUES IN EFFECT UNTIL 9 PM EDT FOR THE WEST MICHIGAN SHORELINE FROM LUDINGTON TO ST. JOSEPH. AT 640PM EDT VERY STRONG THUNDERSTORMS WERE MOVING ACROSS CENTRAL LAKE MICHIGAN WITH SOME REACHING WITHIN 25 MILES WEST OF PENTWATER TO 35 MILES WEST OF MANISTEE. THEY SHOULD REACH THE LUDINGTON TO PENTWATER AREA SHORTLY AFTER 7PM EDT. A SECOND BAND OF VERY STRONG THUNDERSTORMS OVER WEST CENTRAL LAKE MICHIGAN SHOULD REACH THE SHORELINE FROM MUSKEGON TO LUDINGTON BY ABOUT 7 30 PM EDT. MOVEMENT HAS BEEN TO THE EAST cSOUTHEAST AT 45 MILES AN HOUR. BOATING INTERESTS IN THE CENTRAL AND SOUTH SHORELINE AREAS SHOULD TAKE IMMEDIATE SAFETY PRECAUTIONS OR SEEK SAFE HARBOR. FLZ
Local storm report, Jul 15, 9:41 PM EDT, 19 minutes before
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</html>The office that day
Everything else NWS Grand Rapids, MI issued on the same UTC day.
| Issued | Product | Office | Counties | Lasted |
|---|---|---|---|---|
| Jul 15, 8:42 PM EDT | Severe Thunderstorm Warning | GRR | Kent, Ottawa | 48 min |
| Jul 15, 8:51 PM EDT | Tornado Warning | GRR | Allegan, Kent | 39 min |
| Jul 15, 9:17 PM EDT | Tornado Warning | GRR | Barry, Ionia | 58 min |
| Jul 15, 9:49 PM EDT | Severe Thunderstorm Warning | GRR | Calhoun, Eaton | 56 min |
Nearby
Severe Thunderstorm Warnings in Michigan, 1986Every severe thunderstorm warning in 1986
Sources
The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; verification from NCEI's Storm Data; the sounding from the Mesonet's radiosonde archive.